Swing Type Check Valve

Specifications

A swing type check valve is a one-way valve that allows fluid (liquid or gas) to flow in only one direction and prevents reverse flow. It uses a swinging disc or flap to block the reverse flow, hence the name "swing check valve."

 

When fluid flows in the correct direction, pressure pushes the disc open.

 

If the flow reverses, gravity or back pressure forces the disc to swing shut against the seat, preventing backflow.

Q: What is a swing type check valve?
A swing type check valve is a non-return valve that allows fluid to flow in one direction only. It uses a hinged disc (or "flap") that swings open when fluid flows in the desired direction and closes to prevent backflow.

Q: What are the main applications of swing check valves?
They are commonly used in:

Water supply systems

Pumping stations

HVAC systems

Oil & gas pipelines

Fire protection systems

Q: How does a swing check valve work?
When fluid flows in the forward direction, it pushes the disc open. When flow stops or reverses, gravity and backpressure cause the disc to swing shut, preventing reverse flow.

Q: What materials are swing check valves made from?
Typical materials include:

Body: Cast iron, ductile iron, carbon steel, stainless steel, bronze

Disc: Stainless steel, rubber-coated, or brass

Seat: Metal or soft seat (EPDM, NBR, PTFE)

Q: What are the advantages of swing check valves?
Simple design

Low pressure drop

Reliable operation

Suitable for horizontal and vertical (upward flow) installatio